a head on collision in byron and two people killed there. and tonight a 21-year-old man riding a skateboard was killed in concord. abc7 news reporter nick smith is live in concord to explain what happened to the skateboarder. nick? >> dan, good evening. police are not saying much about the accident that took the life of that 21-year-old man. but they have confirmed to me that concord was his home. police tell abc7 news that a woman from clayton was driving this chevy tahoe when she hit and killed a man who was riding on his skateboard. the accident happened just after 4:30 this afternoon shutting down the traffic on monument boulevard and erickson road for hours while police collected evidence at the scene. police have confirmed the skateboarder, a 21-year-old from concord, was in the crosswalk headed northbound at erickson when he was hit by the driver of the chevy tahoe. when emergency personnel arrived at the scene, they immediately learned that the victim suffered major injuries. he was rushed to john muir hospital in walnut creek where